toto65 wrote:Per day we get: 800 x 7,5 = 6.000
Per year: 6000 x 365 = 2.190.000 kwh each year.
My reasoning is certainly wrong but I do not see where.
How is it that there is "only" 520 kWh of electricity production? or 000%
Your reasoning is just toto65!
Annual gas production contains a potential of 2.190.000kWh
This gas feeds a diesel engine whose mechanical efficiency is 24% or an electrical production of 520.000kWh
Classically engines have a yield between 20 and 30%
The rest goes into heat in the exhaust and in the cooling circuit. 1.000.000kWh is recovered and used for heating. This represents approximately 50% of the energy contained in the gas.
The rest (~ 25%) must be lost in the exhaust or perhaps when the cogé works but there is no need for heat (in the hot season for example).
Finally, the methanation tank needs to be heated permanently, which consumes 10 20% (of memory) of the heat produced.
I hope it helps you?
Emmanuel